i am strongly of the view the falling price of onion is bigger crime than its rising price. Because Farmers is bearing the loss of this falling price. When it's price goes up, it goes to the traders, not to the farmers. 
If cost of any farm products will be not met out, people will stop farming.That is why MSP is there, but what the govt. is doing now ? Why prices of onion is not being stabilized through mass procurement by the govt. agencies.